Woogie, you always bring something interesting into the mix. 
Thank you for bringing up the point that many breeds today are the result of unethical breeding. The biggest example I can think of it the "smushy faced" dogs. These are very cute, but those faces aren't good for BREATHING, which is a pretty important face function. Other older breeds like the bulldog have been bred for more and more extreme traits that again, are awful for the dogs that have to live with them.
That being said, our standards for humane treatment of animals are hugely different than they were 100 years ago. I'm thankful that today it's not considered okay to randomly breed dogs together and if you get puppies you don't like, you can just put them in a sack and drown them.
I don't particularly care about breeding yorkies so they all have silky coats and black saddles. I do care that breeders keep records to make sure they are not perpetuating health problems, and that they take lifelong responsibility for every life they create.
I have a hard time believing that someone who is breeding morkies is carefully screening for health problems in both breeds and keeping multi-generational records, because morkies seem to be a "why not?" kind of cross. I understand poodle crosses because of the low allergen factor and because a lot of poodles have health problems. But a morkie seems to just be another way to get a cute, small, low allergen companion.
Again, nothing against morkies, and I too would be happy to own one.
A lot of people don't believe that anyone should breed until the dog overpopulation problem is fixed. Hence, "don't breed or buy while animals die". I think this is an extreme stance though, and it basically means that you'd have no animals bred with forethought after 5 years. I do think that people should think carefully about bringing more dogs into the world when there are already so many without homes. It's not something to do on a whim.